Display device

ABSTRACT

A display device includes a substrate including a display area at which an image is displayed and a non-display area which is adjacent to the display area, and in the non-display area a common voltage transmitting line which is connected to the display area and through which a common voltage is provided to the display area, an organic insulating layer between the common voltage transmitting line and the substrate, a first opening which is in the common voltage transmitting line and exposes the organic insulating layer to outside the common voltage transmitting line and an auxiliary electrode which faces the organic insulating layer with the common voltage transmitting line therebetween, contacts the common voltage transmitting line at the first opening and covers the first opening.

This application is a continuation application of U.S. application Ser.No. 17/142,401 filed Jan. 6, 2021, which claims priority to KoreanPatent Application No. 10-2020-0063157 filed on May 26, 2020, and allthe benefits accruing therefrom under 35 U.S.C. § 119, the entirecontents of which are incorporated herein by reference.

BACKGROUND 1. Field

The disclosure relates to a display device.

2. Description of the Related Art

A display device includes a liquid crystal display (“LCD”), a plasmadisplay panel (“PDP”), an organic light emitting diode (“OLED”) device,a field effect display (“FED”) and an electrophoretic display.

A pixel of the organic light emitting device includes two electrodes andan organic emission layer disposed therebetween, and electrons injectedfrom a cathode that is one of the two electrodes and holes injected froman anode are combined on the organic emission layer to form excitons,and the excitons discharge energy and emit light.

In a display device, a voltage applying unit for applying a voltage tothe cathode from among the two electrodes of the organic light emittingdevice is disposed in a peripheral area adjacent to a display area inwhich a plurality of pixels are disposed.

SUMMARY

Embodiments provide a display device including a voltage applying unitwhich reduces or effectively prevents both an electrode layer on anorganic insulator from peeling off by a processing gas and an increasein signal resistance.

Embodiments are not limited to the above-described features, and may beexpanded in various ways in the range of the ideas and the areas of theinvention.

An embodiment provides a display device including a substrate includinga display area at which an image is displayed and a non-display areawhich is adjacent to the display area, and in the non-display area acommon voltage transmitting line which is connected to the display areaand through which a common voltage is provided to the display area, anorganic insulating layer between the common voltage transmitting lineand the substrate, a first opening which is in the common voltagetransmitting line and exposes the organic insulating layer to outsidethe common voltage transmitting line and an auxiliary electrode whichfaces the organic insulating layer with the common voltage transmittingline therebetween, contacts the common voltage transmitting line at thefirst opening and covers the first opening.

The display device may further include a first electrode and a secondelectrode in the display area, and an organic emission layer between thefirst electrode and the second electrode. The common voltagetransmitting line may be connected to the second electrode, and theauxiliary electrode may be in a same layer as the first electrode.

The display device may further include a first common voltagetransmitting line below the organic insulating layer in the non-displayarea, the organic insulating layer may include a second openingoverlapping the first common voltage transmitting line, and the commonvoltage transmitting line may be connected to the first common voltagetransmitting line through the second opening.

The second electrode may extend to the non-display area, an end portionof the second electrode may overlap the second opening and may beconnected to the common voltage transmitting line at a positionoverlapping the second opening, and the auxiliary electrode may not bedirectly connected to the second electrode.

The display device may further include a connecting member between theend portion of the second electrode and the common voltage transmittingline, and the connecting member may be in a same layer as the firstelectrode.

The display device may further include an insulating layer below thefirst common voltage transmitting line, and a plurality of recessportions may be in the insulating layer and contacting the first commonvoltage transmitting line from among surfaces of the insulating layer.

An embodiment provides a display device including a substrate includinga display area and a non-display area which is adjacent to the displayarea, a transistor including a semiconductor layer, a gate electrode, aninput electrode and an output electrode in the display area of thesubstrate, a first common voltage transmitting line in the non-displayarea of the substrate and in a same layer as the input electrode and theoutput electrode of the transistor, a first organic insulating layer onthe transistor of the display area and the first common voltagetransmitting line of the non-display area, a data line and a drivingvoltage line on the first organic insulating layer in the display areaof the substrate, a second common voltage transmitting line on the firstorganic insulating layer in the non-display area of the substrate,connected to the first common voltage transmitting line and including anopening overlapping the first organic insulating layer, a second organicinsulating layer on the data line and the driving voltage line, anorganic light emitting element on the second organic insulating layer ofthe display area and including a first electrode, an organic emissionlayer and a second electrode, and an auxiliary electrode on the secondcommon voltage transmitting line of the non-display area and completelycovering the opening.

The second electrode may extend to the non-display area and may beconnected to the second common voltage transmitting line, and theauxiliary electrode may not be directly connected to the secondelectrode.

The first common voltage transmitting line of the non-display area maybe in a same layer as the input electrode and the output electrode ofthe display area.

The second common voltage transmitting line of the non-display area maybe in a same layer as the data line and the driving voltage line of thedisplay area.

The auxiliary electrode of the non-display area may be in a same layeras the first electrode of the display area.

The auxiliary electrode of the non-display area and the second electrodeof the display area may be in a same layer as each other.

An embodiment provides a display device including a display area and anon-display area which is adjacent to the display area, the display areaincludes a semiconductor layer, a first insulating layer on thesemiconductor layer, a gate electrode on the first insulating layer andoverlapping the semiconductor layer, a second insulating layer on thegate electrode, a storage electrode on the second insulating layer, athird insulating layer on the storage electrode, an input electrode andan output electrode on the third insulating layer and connected to thesemiconductor layer, a first organic insulating layer on the inputelectrode and the output electrode, a data line and a driving voltageline on the first organic insulating layer, a second organic insulatinglayer on the data line and the driving voltage line, a first electrodeon the second organic insulating layer, a pixel defining layer includinga pixel opening overlapping the first electrode, an emission layer inthe pixel opening, and a second electrode on the pixel defining layerand the emission layer, the non-display area includes a first commonvoltage transmitting line on the third insulating layer, a second commonvoltage transmitting line on the first organic insulating layer on thefirst common voltage transmitting line, connected to the first commonvoltage transmitting line through a first opening and a second openingin the first organic insulating layer, and including a third openingoverlapping the first organic insulating layer, an auxiliary electrodeon the second common voltage transmitting line and completely coveringthe third opening, and a first spacer and a second spacer on the secondcommon voltage transmitting line and having different heights, and thesecond electrode extends to the non-display area and is connected to thesecond common voltage transmitting line.

The third opening of the second common voltage transmitting line may bebetween the first spacer and the second spacer, and the third opening ofthe second common voltage transmitting line may be between a firstportion of the second common voltage transmitting line in the firstopening and a second portion of the second common voltage transmittingline in the second opening.

The first spacer may be on the first organic insulating layer of thenon-display area, and may include a first layer in a same layer as thesecond organic insulating layer and a second layer on the first layerand in a same layer as the pixel defining layer, the second spacer maybe on the first organic insulating layer of the non-display area, andmay include a first layer in a same layer as the second organicinsulating layer, a second layer on the first layer and in a same layeras the pixel defining layer, and a third layer on the second layer andincluding an organic material, and the inorganic encapsulation layer ofthe thin film encapsulation layer may overlap the first spacer and thesecond spacer, and the organic encapsulation layer of the thin filmencapsulation layer may not overlap the first spacer and the secondspacer.

The display device may further include a thin film encapsulation layerfor covering the display area and the non-display area and including aninorganic encapsulation layer and an organic encapsulation layer. Theinorganic encapsulation layer of the thin film encapsulation layer mayoverlap the first spacer and the second spacer, and the organicencapsulation layer of the thin film encapsulation layer may not overlapthe first spacer and the second spacer.

According to the embodiments, the display device includes a commonvoltage applying unit for reducing or effectively preventing peeling offof a common electrode layer on an organic insulator by the processinggas generated by the organic insulator, which reduces or effectivelyprevents electrical signal resistance from increasing.

The effects of the invention are not limited to the above-describedeffects, and may be expanded in various ways in the range of the ideasand the areas of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other advantages and features of this disclosure willbecome more apparent by describing in further detail embodiments thereofwith reference to the accompanying drawings, in which:

FIG. 1 shows a top plan view of an embodiment of a display device.

FIG. 2 shows a cross-sectional view with respect to line II-II of FIG. 1.

FIG. 3 shows a top plan view of an embodiment of a common voltageapplying unit of a display device.

FIG. 4 shows a cross-sectional view of FIG. 3 .

FIG. 5A and FIG. 5B show photographs taken by an electron microscope ofa comparative display device.

FIG. 6 to FIG. 8 show cross-sectional views of an embodiment of a methodfor providing the display device of FIG. 2 .

FIG. 9 shows a cross-sectional view of an embodiment of a displaydevice.

FIG. 10 to FIG. 13 show cross-sectional views of an embodiment of amethod for providing the display device of FIG. 9 .

FIG. 14 shows a cross-sectional view of an embodiment of a displaydevice.

FIG. 15 shows a cross-sectional view of an embodiment of a displaydevice.

FIG. 16 shows a cross-sectional view of an embodiment of a displaydevice.

FIG. 17 shows a cross-sectional view of an embodiment of a displaydevice.

DETAILED DESCRIPTION

The invention will be described more fully hereinafter with reference tothe accompanying drawings, in which embodiments of the invention areshown. As those skilled in the art would realize, the embodiments may bemodified in various different ways, all without departing from thespirit or scope of the invention.

Parts that are irrelevant to the description will be omitted to clearlydescribe the invention, and the same elements will be designated by thesame reference numerals throughout the specification.

The size and thickness of each configuration shown in the drawings arearbitrarily shown for better understanding and ease of description, butthe invention is not limited thereto. In the drawings, the thickness oflayers, films, panels, regions, etc., are exaggerated for clarity. Thethicknesses of some layers and areas are exaggerated for convenience ofexplanation.

It will be understood that when an element such as a layer, film,region, or substrate is referred to as being related to another elementsuch as being “on” another element, it can be directly on the otherelement or intervening elements may also be present. In contrast, whenan element is referred to as being related to another element such as“directly on” another element, there are no intervening elementspresent. The word “on” or “above” means disposed on or below the objectportion, and does not necessarily mean disposed on the upper side of theobject portion based on a gravitational direction.

Unless explicitly described to the contrary, the word “comprise” andvariations such as “comprises” or “comprising” will be understood toimply the inclusion of stated elements but not the exclusion of anyother elements.

The phrase “in a plan view” means viewing an object portion from thetop, and the phrase “in a cross-sectional view” means viewing across-section of which the object portion is vertically cut from theside.

When it is described that a part is “connected (in contact with,coupled)” to another part, the part may be “directly connected” to theother element, may be “connected” to the other part through a thirdpart, or may be connected to the other part physically or electrically,and they may be referred to by different titles depending on positionsor functions, but they may be substantially integrated into one body.

It will be understood that, although the terms “first,” “second,”“third” etc. may be used herein to describe various elements,components, regions, layers and/or sections, these elements, components,regions, layers and/or sections should not be limited by these terms.These terms are only used to distinguish one element, component, region,layer or section from another element, component, region, layer orsection. Thus, “a first element,” “component,” “region,” “layer” or“section” discussed below could be termed a second element, component,region, layer or section without departing from the teachings herein.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting. As used herein,“a”, “an,” “the,” and “at least one” do not denote a limitation ofquantity, and are intended to include both the singular and plural,unless the context clearly indicates otherwise. For example, “anelement” has the same meaning as “at least one element,” unless thecontext clearly indicates otherwise. “At least one” is not to beconstrued as limiting “a” or “an.” “Or” means “and/or.” As used herein,the term “and/or” includes any and all combinations of one or more ofthe associated listed items. It will be further understood that theterms “comprises” and/or “comprising,” or “includes” and/or “including”when used in this specification, specify the presence of statedfeatures, regions, integers, steps, operations, elements, and/orcomponents, but do not preclude the presence or addition of one or moreother features, regions, integers, steps, operations, elements,components, and/or groups thereof.

Furthermore, relative terms, such as “lower” or “bottom” and “upper” or“top,” may be used herein to describe one element's relationship toanother element as illustrated in the Figures. It will be understoodthat relative terms are intended to encompass different orientations ofthe device in addition to the orientation depicted in the Figures. Forexample, if the device in one of the figures is turned over, elementsdescribed as being on the “lower” side of other elements would then beoriented on “upper” sides of the other elements. The term “lower,” cantherefore, encompasses both an orientation of “lower” and “upper,”depending on the particular orientation of the figure. Similarly, if thedevice in one of the figures is turned over, elements described as“below” or “beneath” other elements would then be oriented “above” theother elements. The terms “below” or “beneath” can, therefore, encompassboth an orientation of above and below.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneof ordinary skill in the art to which this disclosure belongs. It willbe further understood that terms, such as those defined in commonly useddictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of the relevant art and thepresent disclosure, and will not be interpreted in an idealized oroverly formal sense unless expressly so defined herein.

Embodiments are described herein with reference to cross sectionillustrations that are schematic illustrations of idealized embodiments.As such, variations from the shapes of the illustrations as a result,for example, of manufacturing techniques and/or tolerances, are to beexpected. Thus, embodiments described herein should not be construed aslimited to the particular shapes of regions as illustrated herein butare to include deviations in shapes that result, for example, frommanufacturing. For example, a region illustrated or described as flatmay, typically, have rough and/or nonlinear features. Moreover, sharpangles that are illustrated may be rounded. Thus, the regionsillustrated in the figures are schematic in nature and their shapes arenot intended to illustrate the precise shape of a region and are notintended to limit the scope of the present claims.

An embodiment of display device 1000 will now be described withreference to FIG. 1 and FIG. 2 . FIG. 1 shows a top plan view of anembodiment of a display device 1000, and FIG. 2 shows a cross-sectionalview with respect to line II-II of FIG. 1 .

Referring to FIG. 1 , the display device 1000 includes a display area DAfor displaying images and a non-display area NDA disposed adjacent toand on an outer side of the display area DA. A plurality of pixels is inthe display area DA, at which light is generated and/or emitted, animage is displayed, etc.

The non-display area NDA includes a driving area PA in which a driver600 for transmitting an electrical signal to the display area DA isdisposed.

Driving voltage transmitting lines 400 a and 400 b for transmittingdriving voltages as electrical signals, and a common voltagetransmitting line 500 for transmitting a common voltage as an electricalsignal, are disposed in the non-display area NDA.

The driving voltage transmitting lines 400 a and 400 b include twoportions that are separated from each other with the display area DAtherebetween, and the common voltage transmitting line 500 extends alongthe non-display area NDA starting from the driver 600 and ending at thedriver 600, to surround the display area A. However, the arrangement ofthe driving voltage transmitting lines 400 a and 400 b and the commonvoltage transmitting line 500 is not limited thereto.

An interlayer configuration of the display area DA and the non-displayarea NDA will now be described with reference to FIG. 2 .

As described above, the display device 1000 includes a display area DAand a non-display area NDA.

The display device 1000 includes a substrate 110, and the substrate 110may be flexible. Although not shown, the substrate 110 may include aplurality of insulation films overlapping each other, and may furtherinclude a barrier film disposed among the overlapping insulation films.

A buffer layer 120 is disposed on the substrate 110. The buffer layer120 may include a single insulating layer such as a silicon nitride(SiNx) or a silicon oxide (SiOx), or a plurality of layers where thesilicon nitride (SiNx) and the silicon oxide (SiOx) are stacked. Thebuffer layer 120 reduces or effectively prevents permeation ofunnecessary components such as impurities or moisture.

A first semiconductor layer 135 (e.g., first semiconductor pattern) anda second semiconductor layer 136 (e.g., second semiconductor pattern)are disposed on the buffer layer 120 of the display area DA.

The first semiconductor layer 135 and the second semiconductor layer 136may include polysilicon or an oxide semiconductor. In this instance, theoxide semiconductor may include an oxide based on titanium (Ti), hafnium(Hf), zirconium (Zr), aluminum (Al), tantalum (Ta), germanium (Ge), zinc(Zn), gallium (Ga), tin (Sn), or indium (In), or a complex oxidethereof.

The first semiconductor layer 135 includes a first channel region 1355,and a first source region 1356, and a first drain region 1357 disposedon respective sides of the first channel region 1355. In a similarmanner, the second semiconductor layer 136 includes a second channelregion 1365, and a second source region 1366, and a second drain region1367 disposed on respective sides of the second channel region 1365. Thefirst channel region 1355 of the first semiconductor layer 135 and thesecond channel region 1365 of the second semiconductor layer 136 mayrepresent regions to which no impurity is doped, and the first sourceregion 1356 and the first drain region 1357 of the first semiconductorlayer 135 and the second source region 1366 and the second drain region1367 of the second semiconductor layer 136 may represent regions towhich conductive impurities are doped.

A first gate insulating film 140 is disposed on the first semiconductorlayer 135 and the second semiconductor layer 136.

A first gate electrode 125 and a second gate electrode 126 are disposedon the first gate insulating film 140 of the display area DA.

The first gate electrode 125 overlaps or corresponds to the firstchannel region 1355, and the second gate electrode 126 overlaps orcorresponds to the second channel region 1365.

A second gate insulating film 142 (e.g., second insulating layer) isdisposed on the first gate electrode 125 and the second gate electrode126.

The first gate insulating film 140 and the second gate insulating film142 may be a single film including a silicon oxide (SiOx) or a siliconnitride (SiNx), or a multilayer on which they are stacked.

A storage electrode 127 is disposed on the second gate insulating film142.

A first insulating layer 150 (e.g., a third insulating layer in orderafter the first gate insulating film 140 and the second gate insulatingfilm 142) is disposed on the storage electrode 127. The first insulatinglayer 150 may be a single film including a silicon oxide (SiOx) or asilicon nitride (SiNx), or a multilayer on which they are stacked.

A first contact hole 56 overlapping the first source region 1356 of thefirst semiconductor layer 135, a second contact hole 57 overlapping thefirst drain region 1357 of the first semiconductor layer 135, a thirdcontact hole 66 overlapping the second source region 1366 of the secondsemiconductor layer 136, and a fourth contact hole 67 overlapping thesecond drain region 1367 of the second semiconductor layer 136 areprovided or formed in the first gate insulating film 140, the secondgate insulating film 142 and the first insulating layer 150.

A first input electrode 76, a first output electrode 77, a second inputelectrode 86 and a second output electrode 87 are disposed on the firstinsulating layer 150 of the display area DA. A first common voltagetransmitting line 500 a (e.g., first common voltage transmitting layer)of the common voltage transmitting line 500 is disposed on the firstinsulating layer 150 of the non-display area NDA.

The first common voltage transmitting line 500 a of the common voltagetransmitting line 500 may be simultaneously formed with the first inputelectrode 76, the first output electrode 77, the second input electrode86 and the second output electrode 87 of the display area DA. That is,the first common voltage transmitting line 500 a may be in a same layeras the first input electrode 76 of the display area DA, the first outputelectrode 77, the second input electrode 86 and the second outputelectrode 87. As being “in a same layer,” elements are respectiveportions or respective patterns of a same material layer.

The first input electrode 76 is connected to the first source region1356 of the first semiconductor layer 135 through the first contact hole56, the first output electrode 77 is connected to the first drain region1357 of the first semiconductor layer 135 through the second contacthole 57, the second input electrode 86 is connected to the second sourceregion 1366 of the second semiconductor layer 136 through the thirdcontact hole 66, and the second output electrode 87 is connected to thesecond drain region 1367 of the second semiconductor layer 136 throughthe fourth contact hole 67. Although not shown, the first outputelectrode 77 may be connected to the second gate electrode 126.

A first interlayer insulating film 160 (e.g., first organic insulatinglayer) is disposed on the first input electrode 76, the first outputelectrode 77, the second input electrode 86 and the second outputelectrode 87. The first interlayer insulating film 160 may include anorganic material.

A fifth contact hole 71 overlapping the first input electrode 76, asixth contact hole 72 overlapping the second input electrode 86, and aseventh contact hole 73 overlapping the second output electrode 87 areprovided or formed in the first interlayer insulating film 160 of thedisplay area DA. An eighth contact hole 74 overlapping the storageelectrode 127 is provided or formed in the first interlayer insulatingfilm 160 and the first insulating layer 150. A first opening 61 and asecond opening 62 overlapping the first common voltage transmitting line500 a of the common voltage transmitting line 500 are provided or formedin the first interlayer insulating film 160 of the non-display area NDA.

A data line 171, a driving voltage line 172 and an output member 173 aredisposed on the first interlayer insulating film 160 of the display areaDA. A second common voltage transmitting line 500 b (e.g., second commonvoltage transmitting layer) of the common voltage transmitting line 500is disposed on the first interlayer insulating film 160 of thenon-display area NDA.

The data line 171 of the display area DA is connected to the first inputelectrode 76 through the fifth contact hole 71, and the driving voltageline 172 is connected to the second input electrode 86 through the sixthcontact hole 72 and is connected to the storage electrode 127 throughthe eighth contact hole 74. The output member 173 is connected to thesecond output electrode 87 through the seventh contact hole 73.

The second common voltage transmitting line 500 b of the common voltagetransmitting line 500 of the non-display area NDA may be simultaneouslyformed with the data line 171, the driving voltage line 172 and theoutput member 173 of the display area DA. That is, the second commonvoltage transmitting line 500 b may be in a same layer as the data line171, the driving voltage line 172 and the output member 173.

The first common voltage transmitting line 500 a disposed below thefirst interlayer insulating film 160 is connected to the second commonvoltage transmitting line 500 b disposed above the first interlayerinsulating film 160 at or through the first opening 61 and the secondopening 62 of the first interlayer insulating film 160. The firstopening 61 and the second opening 62 of the first interlayer insulatingfilm 160 overlaps the first common voltage transmitting line 500 a. Thesecond common voltage transmitting line 500 b which is above the firstinterlayer insulating film 160 extends into the first opening 61 and thesecond opening 62 to contact the first common voltage transmitting line500 a at the first opening 61 and the second opening 62.

As described, an electrical signal resistance of the common voltagetransmitting line 500 may be reduced by providing or forming the commonvoltage transmitting line 500 as a double-layer structure including thefirst common voltage transmitting line 500 a and the second commonvoltage transmitting line 500 b in different layers from each other andin contact with each other.

Regarding the common voltage transmitting line 500, the second commonvoltage transmitting line 500 b disposed on the first interlayerinsulating film 160 including an organic material includes or defines athird opening 51 provided in plural including a plurality of thirdopenings 51 overlapping a portion of the first interlayer insulatingfilm 160 which is in the non-display area NDA. Processing gas that maybe generated by the first interlayer insulating film 160 including anorganic material may be discharged to the outside through the pluralityof third openings 51 of the second common voltage transmitting line 500b. By these third openings 51, peeling off of the second common voltagetransmitting line 500 b from the first interlayer insulating film 160 bythe processing gas may be reduced or effectively prevented. A secondinterlayer insulating film 180 (e.g., second organic insulating layer)is disposed on the data line 171, the driving voltage line 172 and theoutput member 173 of the display area DA. A first spacer portion SP11 ofa first spacer SP1 and a second spacer portion SP21 of a second spacerSP2 are disposed on the second common voltage transmitting line 500 b ofthe non-display area NDA.

The second interlayer insulating film 180, the first spacer portion SP11and the second spacer SP2 may include organic materials, and may be in asame layer as each other.

A ninth contact hole 81 overlapping the output member 173 is disposed inthe second interlayer insulating film 180.

A pixel electrode 710 (e.g., first electrode) is disposed on the secondinterlayer insulating film 180 in the display area DA. The pixelelectrode 710 is connected to the output member 173 through the ninthcontact hole 81 in the second interlayer insulating film 180.

The pixel electrode 710 may be an anode of an organic light emittingelement 70.

A first auxiliary electrode 501 covering a plurality of third openings51 of the second common voltage transmitting line 500 b is disposed onthe second common voltage transmitting line 500 b disposed on the secondinterlayer insulating film 180 in the non-display area NDA. The firstauxiliary electrode 501 is disposed on the second common voltagetransmitting line 500 b and covers a plurality of third openings 51 ofthe second common voltage transmitting line 500 b to thus connectportions of the second common voltage transmitting line 500 b which arespaced apart from each other by the plurality of third openings 51, andreduce or effectively prevent increase of electrical signal resistanceof the second common voltage transmitting line 500 b.

The pixel electrode 710 and the first auxiliary electrode 501 may be ina same layer as each other.

A pixel defining layer 190 is disposed on the pixel electrode 710 of thedisplay area DA. The pixel defining layer 190 includes or defines apixel opening 195 overlapping the pixel electrode 710. The pixel opening195 of the pixel defining layer 190 is disposed in the display area DA,and the pixel defining layer 190 is mainly disposed in the display areaDA.

A third spacer portion SP12 of the first spacer SP1 and a fourth spacerportion SP22 of the second spacer SP2 are disposed in the non-displayarea NDA.

The pixel defining layer 190, the third spacer portion SP12 and thefourth spacer portion SP22 may be in a same layer as each other.

The pixel defining layer 190 may include a resin such as a polyacrylateor a polyimide and a silica-based inorganic material. The pixel defininglayer 190 may include a black color pigment or/and a dye to absorbexternal light, thereby reducing reflectance of the external light andincreasing a contrast ratio of the display device 1000.

An organic emission layer 720 is disposed in the pixel opening 195 ofthe pixel defining layer 190 disposed in the display area DA.

The organic emission layer 720 may be a multi-layered structureincluding at least one of an emission layer, a hole injection layer(“HIL”), a hole transporting layer (“HTL”), an electron transportinglayer (“ETL”) and an electron injection layer (“EIL”). When the organicemission layer 720 includes all of the aforementioned layers, the holeinjection layer may be disposed on the pixel electrode 710 that is ananode of the organic light emitting element 70, and the holetransporting layer, the emission layer, the electron transporting layerand the electron injection layer may be sequentially stacked thereon.

A common electrode 730 (e.g., second electrode) is disposed on the pixeldefining layer 190 and the organic emission layer 720. The commonelectrode 730 becomes a cathode of the organic light emitting element70. Therefore, the pixel electrode 710, the organic emission layer 720and the common electrode 730 together define an organic light emittingelement 70.

The common electrode 730 is disposed on an entirety of the display areaDA, and extends from the display area DA to the non-display area NDA tooverlap the first opening 61 of the first interlayer insulating film160. At the first opening 61, the common electrode 730 contacts thecommon voltage transmitting line 500 to receive the common voltagetransmitted through the common voltage transmitting line 500.

The first semiconductor layer 135, the first gate electrode 125, thefirst input electrode 76 and the first output electrode 77 configure afirst transistor, and the second semiconductor layer 136, the secondgate electrode 126, the second input electrode 86 and the second outputelectrode 87 configure a second transistor. The first transistor may bea switching transistor, and the second transistor may be a drivingtransistor.

When an electrical signal such as a gate-on signal is applied to thefirst gate electrode 125 and an electrical signal such as a data signalis input to the first input electrode 76 from the data line 171, thedata signal is transmitted to the first output electrode 77 and is thentransmitted to the second gate electrode 126. The driving voltageapplied to the driving voltage line 172 is applied to the second inputelectrode 86, and a corresponding electrical driving current flows tothe second output electrode 87 through the second channel region 1365 ofthe second semiconductor layer 136. The voltage applied to the secondoutput electrode 87 is transmitted to the pixel electrode 710 throughthe output member 173, and the common voltage is applied to the commonelectrode 730 through the common voltage transmitting line 500. Thepixel electrode 710 is an anode that is a hole injecting electrode, andthe common electrode 730 is a cathode that is an electron injectingelectrode. Holes and electrons are injected into the organic emissionlayer 720 from the pixel electrode 710 and the common electrode 730, andwhen excitons that are a combination of the injected holes and electronstransit to the ground state from the excited state, light emits.

A capacitor Cst is connected between the second gate electrode 126 andthe storage electrode 127. The capacitor Cst charges the data signalapplied to the second gate electrode 126 and maintains the same.

A fifth spacer portion SP23 of a second spacer SP2 is disposed in thenon-display area NDA. The fifth spacer portion SP23 may include anorganic material.

As shown, a first spacer SP1 and a second spacer SP2 are disposed on anexternal side of the non-display area NDA, and the second spacer SP2 isfurther away from the display area DA than the first spacer SP1. Thatis, the second spacer SP2 is disposed closer to an edge of the displaydevice 1000 than the first spacer SP1.

The first spacer SP1 and the second spacer SP2 are disposed on the firstinterlayer insulating film 160, the first spacer SP1 may be provided orformed as a same layer as the second interlayer insulating film 180 andthe pixel defining layer 190, and the second spacer SP2 may be providedby respective patterns of the second interlayer insulating film 180, thepixel defining layer 190 and an additional insulating layer. By this, atop portion of the second spacer SP2 is higher than a top portion of thefirst spacer SP1. That is, each of the first spacer SP1 and the secondspacer SP2 includes a top surface which is furthest from the substrate110, and the top surface of the second spacer SP2 is further from thesubstrate 110 than the top surface of the first spacer SP1.

An encapsulation layer 80 is disposed on the common electrode 730. Theencapsulation layer 80 may be provided or formed by stacking at leastone inorganic layer and at least one organic layer, and the inorganiclayer or the organic layer may be plural, respectively.

In the embodiment, the encapsulation layer 80 includes a first inorganicencapsulation layer 810 a and a second inorganic encapsulation layer 810b facing each other, and an organic encapsulation layer 820 disposedbetween the first inorganic encapsulation layer 810 a and the secondinorganic encapsulation layer 810 b.

The first inorganic encapsulation layer 810 a and the second inorganicencapsulation layer 810 b are provided or formed on the entirety of thesubstrate 110 and are disposed on the first spacer SP1 and the secondspacer SP2. The organic encapsulation layer 820 in the display area DAextends from the display area DA to the non-display area NDA andterminates at a location between the display area DA and the firstspacer SP1. That is, the organic encapsulation layer 820 is not disposedon the outer side of the first spacer SP1 and the second spacer SP2 fromamong positions within the non-display area NDA, where the outer side iscloser to the edge of the display device 1000 than an inner side.

When the organic encapsulation layer 820 is provided or formed, thefirst spacer SP1 and the second spacer SP2 may function as a dam forreducing or effectively preventing overflowing of an organic materialfor forming the organic encapsulation layer 820 to the outer sides ofthe first spacer SP1 and the second spacer SP2. Thus, the organicencapsulation layer 820 may be excluded from the outer sides of thefirst spacer SP1 and the second spacer SP2.

The first opening 61 of the first interlayer insulating film 160 inwhich the first common voltage transmitting line 500 a is connected tothe second common voltage transmitting line 500 b is disposed closer tothe display area DA than the first spacer SP1. That is, the firstopening 61, the first spacer SP1 and the second spacer SP2 are in orderalong the substrate 110, in a direction from the display area DA to theedge of the display device 1000.

A plurality of third openings 51 of the second common voltagetransmitting line 500 b are disposed between the first spacer SP1 andthe second spacer SP2. The second common voltage transmitting line 500 bincludes two end portions respectively connected to the first commonvoltage transmitting line 500 a through the first opening 61 and thesecond opening 62, and middle portions disposed between the two endportions. A plurality of third openings 51 of the second common voltagetransmitting line 500 b are disposed between the two end portions of thesecond common voltage transmitting line 500 b connected to the firstcommon voltage transmitting line 500 a through the first opening 61 andthe second opening 62. The plurality of third openings 51 are defined bythe two end portions and the middle portions of the second commonvoltage transmitting line 500 b.

The second opening 62 of the first interlayer insulating film 160 inwhich the first common voltage transmitting line 500 a is connected tothe second common voltage transmitting line 500 b may overlap orcorrespond to the second spacer SP2.

The first auxiliary electrode 501 is not directly connected to thecommon electrode 730 of the display area DA. Instead, the firstauxiliary electrode 501 is connected to the common electrode 730 of thedisplay area DA via the common voltage transmitting line 500. That is,the auxiliary electrode 501 which contacts the common voltagetransmitting line 500 at the third opening 51 is connected to the secondelectrode (e.g., common electrode 730) by contact at the first openingOP1 of the second electrode with the common voltage transmitting line500.

The configuration of the pixel disposed in the display area DA of thedisplay device shown in FIG. 2 is only an example, and the pixelconfiguration of the display device 1000 is not limited to theconfiguration described with reference to FIG. 2 . The signal line andthe organic light emitting element 70 may have various configurations inthe range in which a person skilled in the art may easily modify. FIG. 2shows a display device 1000 including two thin film transistors (“TFTs”)and one capacitor, but the invention is not limited thereto. Hence, thedisplay device 1000 is not limited to a number of thin film transistors,capacitors and wires (e.g., conductive line and/or signal line).

A common voltage applying unit of a display device 1000 described withreference to FIG. 1 and FIG. 2 will now be described in detail withreference to FIG. 3 to FIG. 5A and FIG. 5B. FIG. 3 shows a top plan viewof an embodiment of a common voltage applying unit of a display device1000, FIG. 4 shows a cross-sectional view with respect to line IV-IV ofFIG. 3 , and FIG. 5 and FIG. 5B show photographs taken by an electronmicroscope of a comparative display device according to a comparativeexample.

Referring to FIG. 3 and FIG. 4 , a buffer layer 120, a first gateinsulating film 140, a second gate insulating film 142 and a firstinsulating layer 150 that are a plurality of insulating layers includinginorganic materials are disposed on the substrate 110 of the non-displayarea NDA of the display device 1000. A first common voltage transmittingline 500 a of the common voltage transmitting line 500 is disposed onthe first insulating layer 150. A first interlayer insulating film 160including an organic material is disposed on the first common voltagetransmitting line 500 a. A second common voltage transmitting line 500 bof the common voltage transmitting line 500 is disposed on the firstinterlayer insulating film 160. The first common voltage transmittingline 500 a may be simultaneously provided or formed with the first inputelectrode 76, the first output electrode 77, the second input electrode86 and the second output electrode 87 of the display area DA. The secondcommon voltage transmitting line 500 b of the common voltagetransmitting line 500 may be simultaneously provided or formed with thedata line 171, the driving voltage line 172 and the output member 173 ofthe display area DA.

The first common voltage transmitting line 500 a overlaps the secondcommon voltage transmitting line 500 b with the first interlayerinsulating film 160 including an organic material therebetween. Thefirst common voltage transmitting line 500 a and the second commonvoltage transmitting line 500 b which face each other are connected toeach other at both of the first opening 61 and the second opening 62 inthe first interlayer insulating film 160. The first opening 61 and thesecond opening 62 are spaced apart from each other along the substrate110 with the first spacer SP1 therebetween. As described above, thecommon voltage transmitting line 500 is provided or formed to be adouble-layered structure including the first common voltage transmittingline 500 a and the second common voltage transmitting line 500 b,thereby reducing electrical signal resistance of the common voltagetransmitting line 500.

The second common voltage transmitting line 500 b includes or defines aplurality of third openings 51. A plurality of third openings 51function as a passage for discharging the processing gas generated bythe first interlayer insulating film 160 including an organic materialto the outside during a process in manufacturing a display device 1000.By this, peeling off of the second common voltage transmitting line 500b from the first interlayer insulating film 160 by the processing gas isreduced or effectively prevented.

FIG. 5A and FIG. 5B are photographs for showing a state in which thesecond common voltage transmitting line 500 b is peeled off by theprocessing gas in a comparative display device according to acomparative example in which the second common voltage transmitting line500 b does not have a plurality of third openings 51, different from oneor more embodiment of the display device 1000. In FIG. 5B shows aphotograph of an enlarged part of FIG. 5A, and portions that are markedby an oval of FIG. 5A and a circle of FIG. 5B indicate that the commonvoltage line is peeled off. As described above, when the processing gasis not outgassed to outside the first interlayer insulating film 160,the second common voltage transmitting line 500 b disposed on the firstinterlayer insulating film 160 including an organic material is peeledoff by the processing gas, and the common voltage transmitting line 500may be short-circuited.

As shown in FIG. 3 , in a plan view, a plurality of third openings 51 ofthe second common voltage transmitting line 500 b may be separated fromeach other along a first direction (e.g., horizontal in FIG. 3 ). In theplan view, the plurality of third openings 51 may be regularly disposedalong a plurality of columns extended along a second direction crossingthe first direction (e.g., vertical in FIG. 3 ). The plurality ofcolumns may be arranged along the first direction. A thickness directionof the display device 1000 (e.g., vertical in FIG. 4 ) is taken along athird direction crossing each of the first direction and the seconddirection.

Shapes of the plurality of third openings 51 in a plan view may be apolygon such as a quadrangle. However, dispositions and planar shapes ofa plurality of third openings 51 are not limited thereto, and aplurality of third openings 51 may be disposed in only a portion of thesecond common voltage transmitting line 500 b, and may have circular oroval shapes in a plan view.

A first spacer portion SP11 and a second spacer portion SP21 of a firstspacer SP1 and a second spacer SP2, respectively, are disposed on thesecond common voltage transmitting line 500 b. The first spacer portionSP11 and the second spacer portion SP21 may be simultaneously providedor formed with the second interlayer insulating film 180 of the displayarea DA.

The first auxiliary electrode 501 is disposed on the second commonvoltage transmitting line 500 b so as to completely cover a plurality ofthird openings 51 of the second common voltage transmitting line 500 b.An end portion 501 a of the first auxiliary electrode 501 at opposingends thereof may be respectively disposed on the first spacer portionSP11 and the second spacer portion SP21, and a connecting portion of thefirst auxiliary electrode 501 which connects the opposing ends to eachother may be disposed on lateral sides of the first spacer portion SP11and the second spacer portion SP21. The first auxiliary electrode 501may be simultaneously provided or formed with the pixel electrode 710 ofthe display area DA.

Within the non-display area NDA, the first opening 61 of the firstinterlayer insulating film 160 in which the first common voltagetransmitting line 500 a is connected to the second common voltagetransmitting line 500 b is disposed nearer the display area DA than thefirst spacer SP1.

A plurality of third openings 51 of the second common voltagetransmitting line 500 b are disposed between the first spacer SP1 andthe second spacer SP2. A plurality of third openings 51 of the secondcommon voltage transmitting line 500 b are disposed between two endportions of the second common voltage transmitting line 500 b at whichthe second common voltage transmitting line 500 b is connected to thefirst common voltage transmitting line 500 a through the first opening61 and the second opening 62, respectively. The first auxiliaryelectrode 501 is not directly connected to the common electrode 730 ofthe display area DA. That is, the auxiliary electrode 501 which contactsthe second common voltage transmitting line 500 b at the opening (e.g.,third opening 51) of the non-display area NDA is connected to the secondelectrode (e.g., common electrode 730) by connection within thenon-display area NDA of the second electrode with the second commonvoltage transmitting line 500 b.

The second opening 62 of the first interlayer insulating film 160 inwhich the first common voltage transmitting line 500 a is connected tothe second common voltage transmitting line 500 b may overlap the secondspacer SP2.

Electrical signal resistance at the second common voltage transmittingline 500 b may increase by a plurality of third openings 51 of thesecond common voltage transmitting line 500 b. However, since the firstauxiliary electrode 501 is disposed on the second common voltagetransmitting line 500 b so as to cover a plurality of third openings 51of the second common voltage transmitting line 500 b, the increase ofthe electrical signal resistance at the second common voltagetransmitting line 500 b may be reduced or effectively prevented byconnecting solid portions of the second common voltage transmitting line500 b spaced apart from each other by the plurality of third openings51.

According to one or more embodiment of the display device 1000, thecommon voltage transmitting line 500 common voltage applying unitdisposed in the non-display area NDA is provided or formed to be adouble-layered structure including the first common voltage transmittingline 500 a and the second common voltage transmitting line 500 brespectively disposed below and above the first interlayer insulatingfilm 160 including an organic material. The first common voltagetransmitting line 500 a and the second common voltage transmitting line500 b which face each other with the first interlayer insulating film160 therebetween are connected to each other by contact of the firstcommon voltage transmitting line 500 a and the second common voltagetransmitting line 500 b at the first opening 61 and the second opening62 in the first interlayer insulating film 160, thereby reducingelectrical signal resistance of the common voltage transmitting line 500and accordingly reducing power consumption.

The second common voltage transmitting line 500 b disposed on the firstinterlayer insulating film 160 including an organic material includes aplurality of third openings 51 to thus outgas the processing gasgenerated by the organic material during the manufacturing process tooutside the second common voltage transmitting line 500 b, and reducingor effectively prevent peeling off of the second common voltagetransmitting line 500 b from the first interlayer insulating film 160 bythe processing gas. The first auxiliary electrode 501 is disposed on thesecond common voltage transmitting line 500 b so as to cover a pluralityof third openings 51 of the second common voltage transmitting line 500b and connect solid portions thereof to each other, thereby reducing oreffectively preventing the electrical signal resistance of the secondcommon voltage transmitting line 500 b from increasing by the pluralityof third openings 51.

An embodiment of a method for manufacturing a display device 1000 willnow be described with reference to FIG. 2 together with FIG. 6 to FIG. 8. FIG. 6 to FIG. 8 show cross-sectional views of an embodiment of amethod for manufacturing a display device 1000.

Referring to FIG. 2 and FIG. 6 , a buffer layer 120 is stacked on asubstrate 110, a first semiconductor layer 135 and a secondsemiconductor layer 136 are provided or formed on the buffer layer 120such as by a first photolithography process, a first gate insulatingfilm 140 is stacked on the first semiconductor layer 135 and the secondsemiconductor layer 136, a first gate electrode 125 and a second gateelectrode 126 are provided or formed on the first gate insulating film140 such as by a second photolithography process, and a first sourceregion 1356 and a first drain region 1357 are provided or formed onrespective sides of a first channel region 1355 and a second sourceregion 1366 and a second drain region 1367 are provided or formed onrespective sides of a second channel region 1365 such as by applying animpurity to the first semiconductor layer 135 and the secondsemiconductor layer 136 by use of the first gate electrode 125 and thesecond gate electrode 126 as masks.

A second gate insulating film 142 is stacked on the first gate electrode125 and the second gate electrode 126, a storage electrode 127 isprovided or formed such as by a third photolithography process, a firstinsulating layer 150 is stacked on the storage electrode 127, a firstcontact hole 56, a second contact hole 57, a third contact hole 66 and afourth contact hole 67 are formed in the first gate insulating film 140,the second gate insulating film 142 and the first insulating layer 150such as by a fourth photolithography process, and a first common voltagetransmitting line 500 a of the common voltage transmitting line 500 isprovided or formed together with the first input electrode 76, the firstoutput electrode 77, the second input electrode 86 and the second outputelectrode 87 such as by a fifth photolithography process. That is, thefirst common voltage transmitting line 500 a, the first input electrode76, the first output electrode 77, the second input electrode 86 and thesecond output electrode 87 are respective patterns of a same conductivematerial layer.

A first interlayer insulating film 160 including an organic material isstacked, and a first opening 61 and a second opening 62 are provided orformed in the first interlayer insulating film 160 together with thefifth contact hole 71, the sixth contact hole 72, the seventh contacthole 73 and the eighth contact hole 74 such as by a sixthphotolithography process.

By a seventh photolithography process, a second common voltagetransmitting line 500 b defining a plurality of third openings 51therein, together with the data line 171, the driving voltage line 172and the output member 173, are disposed on the first interlayerinsulating film 160. That is, the second common voltage transmittingline 500 b, the data line 171, the driving voltage line 172 and theoutput member 173 are respective patterns of a same conductive materiallayer.

As shown in FIG. 7 , the second interlayer insulating film 180 isstacked, a ninth contact hole 81 is provided or formed in the secondinterlayer insulating film 180 such as by an eighth photolithographyprocess, and a first spacer portion SP11 and a second spacer portionSP21 are provided. That is, the second interlayer insulating film 180,the first spacer portion SP11 and the second spacer portion SP21 arerespective patterns of a same insulating material layer.

In this instance, the second interlayer insulating film 180 includes anorganic material, formation of the second interlayer insulating film 180including the organic material includes a curing process such as baking,and processing gas is generated by the first interlayer insulating film160 and the second interlayer insulating film 180 including an organicmaterial during the curing process. Particularly, the processing gasgenerated by the first interlayer insulating film 160 disposed below thesecond common voltage transmitting line 500 b may be outgassed OG tooutside the first interlayer insulating film 160 and the secondinterlayer insulating film 180 through the third openings 51 of thesecond common voltage transmitting line 500 b.

As described, the processing gas generated by the first interlayerinsulating film 160 is outgassed OG through the third opening 51 of thesecond common voltage transmitting line 500 b, so peeling off of thesecond common voltage transmitting line 500 b disposed on the firstinterlayer insulating film 160 including an organic material is reducedor effectively prevented.

As shown in FIG. 8 , a pixel electrode 710 and a first auxiliaryelectrode 501 are provided or formed such as by a ninth photolithographyprocess.

Referring again to FIG. 2 , a pixel defining layer 190, a third spacerportion SP12, a fourth spacer portion SP22 and a fifth spacer portionSP23 are provided or formed such as by a tenth photolithography process,on the stacked structure of FIG. 8 . In an embodiment, the fifth spacerportion SP23 may be provided formed by another photolithography process.The display device 1000 shown in FIG. 2 is provided or formed by formingan organic emission layer 720, a common electrode 730 and anencapsulation layer 80.

According to one or more embodiment of the method for manufacturing adisplay device 1000, during a curing process of an insulating layer,processing gas generated by the first interlayer insulating film 160disposed below the second common voltage transmitting line 500 b may beoutgassed OG through the third openings 51 of the second common voltagetransmitting line 500 b. Therefore, different from the comparativedisplay device shown in FIGS. 5A and 5B, peeling off of the secondcommon voltage transmitting line 500 b from the first interlayerinsulating film 160 by the processing gas may be reduced or effectivelyprevented.

An embodiment of a display device 1000 will now be described withreference to FIG. 9 . FIG. 9 shows a cross-sectional view of a displaydevice 1000.

Referring to FIG. 9 , the display device 1000 is similar to the displaydevice 1000 described with reference to FIG. 1 , FIG. 2 , FIG. 3 andFIG. 4 . No detailed descriptions on the same constituent elements willbe provided.

However, regarding the display device 1000 in FIG. 9 , differing fromthe display device 1000 in FIGS. 1 to 4 , a second auxiliary electrode502 is disposed on the second common voltage transmitting line 500 b ofthe non-display area NDA. The second auxiliary electrode 502 may bedisposed on the second common voltage transmitting line 500 b to cover aplurality of third openings 51 of the second common voltage transmittingline 500 b. End portions of the second common voltage transmitting line500 b may be positioned not on the first spacer portion SP11 and thesecond spacer portion SP21, but on a top surface of the third spacerportion SP12 and a top surface of the fourth spacer portion SP22, wherethe top surface is furthest from the substrate 110. The second auxiliaryelectrode 502 may be simultaneously provided or formed with the commonelectrode 730. That is, the second auxiliary electrode 502 and thecommon electrode 730 may be in a same layer as each other. The secondauxiliary electrode 502 is not directly connected to the commonelectrode 730 of the display area DA.

As similarly described above, in the display device 1000 of FIG. 9 , thecommon voltage transmitting line 500 disposed in the non-display areaNDA is formed as a double-layered structure including a first commonvoltage transmitting line 500 a and a second common voltage transmittingline 500 b respectively disposed above and below the first interlayerinsulating film 160 including an organic material. The first commonvoltage transmitting line 500 a and a second common voltage transmittingline 500 b which face each other contact each other to be connected toeach other at the first opening 61 and the second opening 62 in thefirst interlayer insulating film 160, thereby reducing electrical signalresistance of the common voltage transmitting line 500 and reducingpower consumption. The second common voltage transmitting line 500 bdisposed on the first interlayer insulating film 160 including anorganic material includes a plurality of third openings 51 to outgas theprocessing gas generated by the organic material during themanufacturing process to the outside, thereby reducing or effectivelypreventing peeling off of the second common voltage transmitting line500 b from the first interlayer insulating film 160 by the processinggas. The second auxiliary electrode 502 is disposed on the second commonvoltage transmitting line 500 b to cover a plurality of third openings51 of the second common voltage transmitting line 500 b, therebyreducing or effectively preventing the electrical signal resistance ofthe second common voltage transmitting line 500 b from increasing by theplurality of third openings 51.

Many features according to the above-described embodiments areapplicable to the display device 1000 according to the embodiment inFIG. 9 .

A method for manufacturing a display device 1000 will now be describedwith reference to FIG. 9 together with FIG. 10 to FIG. 13 . FIG. 10 toFIG. 13 show cross-sectional views of an embodiment of a method formanufacturing a display device 1000.

Referring to FIG. 9 and FIG. 10 , a buffer layer 120 is stacked on thesubstrate 110, a first semiconductor layer 135 and a secondsemiconductor layer 136 are provided or formed on the buffer layer 120such as by a first photolithography process, a first gate insulatingfilm 140 is stacked on the first semiconductor layer 135 and the secondsemiconductor layer 136, a first gate electrode 125 and a second gateelectrode 126 are provided or formed on the first gate insulating film140 such as by a second photolithography process, and the first gateelectrode 125 and the second gate electrode 126 are used as masks andimpurities are applied to the first semiconductor layer 135 and thesecond semiconductor layer 136 to provide or form a first source region1356 and a first drain region 1357 on respective sides of a firstchannel region 1355 and a second source region 1366 and a second drainregion 1367 on respective sides of a second channel region 1365.

A second gate insulating film 142 is stacked on the first gate electrode125 and the second gate electrode 126, a storage electrode 127 isprovided or formed such as by a third photolithography process, a firstinsulating layer 150 is stacked on the storage electrode 127, a firstcontact hole 56, a second contact hole 57, a third contact hole 66, anda fourth contact hole 67 are formed in the first gate insulating film140, the second gate insulating film 142, and the first insulating layer150 such as by a fourth photolithography process, and a first commonvoltage transmitting line 500 a of the common voltage transmitting line500 is provided or formed together with a first input electrode 76, afirst output electrode 77, a second input electrode 86, and a secondoutput electrode 87 such as by a fifth photolithography process.

A first interlayer insulating film 160 including an organic material isstacked, and a first opening 61 and a second opening 62 are provided orformed in the first interlayer insulating film 160 together with a fifthcontact hole 71, a sixth contact hole 72, a seventh contact hole 73, andan eighth contact hole 74 such as by a sixth photolithography process.

A second common voltage transmitting line 500 b including a plurality ofthird openings 51 is provided or formed on the first interlayerinsulating film 160 together with a data line 171, a driving voltageline 172, and an output member 173 by a seventh photolithographyprocess.

As shown in FIG. 11 , a second interlayer insulating film 180 isstacked, a ninth contact hole 81 is provided formed in the secondinterlayer insulating film 180 such as by an eighth photolithographyprocess, and a first spacer portion SP11 and a second spacer portionSP21 are provided or formed. Here, during the curing process of thesecond interlayer insulating film 180, the processing gas generated bythe first interlayer insulating film 160 disposed below the secondcommon voltage transmitting line 500 b may be outgassed OG through thethird openings 51 of the second common voltage transmitting line 500 b.

As shown in FIG. 12 , a pixel electrode 710 is provided or formed suchas by a ninth photolithography process, and a pixel defining layer 190,a third spacer portion SP12, a fourth spacer portion SP22, and a fifthspacer portion SP23 are provided or formed such as by a tenthphotolithography process. In an embodiment, the fifth spacer portionSP23 may be provided or formed by another photolithography processdifferent from the tenth photolithography process. In this instance,during a curing process of the pixel defining layer 190, the processinggas generated by the first interlayer insulating film 160 disposed belowthe second common voltage transmitting line 500 b may be outgassed OGthrough the third openings 51 of the second common voltage transmittingline 500 b.

As shown in FIG. 13 , an organic emission layer 720 is provided orformed, and a second auxiliary electrode 502 is provided or formedtogether with a common electrode 730 such as by a ninth photolithographyprocess. An encapsulation layer 80 is then or provided or formed,thereby providing the display device 1000 shown in FIG. 9 .

According to one or more embodiment of the method for manufacturing adisplay device 1000, during a curing process of an insulating layer,processing gas generated by the first interlayer insulating film 160disposed below the second common voltage transmitting line 500 b may beoutgassed OG through the third openings 51 of the second common voltagetransmitting line 500 b. Therefore, different from the comparativedisplay device, as shown in FIG. 5 , peeling off of the second commonvoltage transmitting line 500 b from the first interlayer insulatingfilm 160 by the processing gas may be reduced or effectively prevented.

An embodiment of a display device 1000 will now be described withreference to FIG. 14 . FIG. 14 shows a cross-sectional view of a displaydevice 1000.

Referring to FIG. 14 , the display device 1000 is similar to the displaydevice 1000 described with reference to FIG. 1 , FIG. 2 , FIG. 3 andFIG. 4 . No detailed descriptions on the same constituent elements willbe provided.

However, according to the display device 1000 in FIG. 14 , at the firstopening 61 of the first interlayer insulating film 160 of thenon-display area NDA, a connecting member 701 is disposed between thecommon voltage transmitting line 500 and the common electrode 730.

The connecting member 701 may be simultaneously with the pixel electrode710, and supports electrical connection between the common voltagetransmitting line 500 and the common electrode 730. The common electrode730 is disposed on the first interlayer insulating film 160 including anorganic material that is relatively thick, the second interlayerinsulating film 180 and the pixel defining layer 190, so the commonelectrode 730 may be short-circuited by a step of these layers, suchthat the electrical connection between the common electrode 730 and thecommon voltage transmitting line 500 may be unstable. However, accordingto the display device 1000 in FIG. 14 , the connecting member 701electrically connects the common voltage transmitting line 500 and thecommon electrode 730 to each other and is provided in a same layer asthe pixel electrode 710, so the common voltage transmitting line 500 maybe electrically connected to the common electrode 730 through theconnecting member 701.

As similarly described above for the embodiment with reference to FIG. 1and FIG. 2 FIG. 3 and FIG. 4 , in the display device 1000 of FIG. 14 ,the common voltage transmitting line 500 disposed in the non-displayarea NDA is provided or formed to be a double layered-structureincluding a first common voltage transmitting line 500 a and a secondcommon voltage transmitting line 500 b respectively disposed below andabove the first interlayer insulating film 160 including an organicmaterial. The first common voltage transmitting line 500 a and a secondcommon voltage transmitting line 500 b which face each other areconnected to each other by contacting each other at the first opening 61and the second opening 62 in the first interlayer insulating film 160,thereby reducing electrical signal resistance of the common voltagetransmitting line 500 and accordingly reducing power consumption. Thesecond common voltage transmitting line 500 b disposed on the firstinterlayer insulating film 160 including an organic material includes aplurality of third openings 51 to outgas the processing gas generated bythe organic material during the manufacturing process to the outside,thereby reducing or effectively preventing peeling off of the secondcommon voltage transmitting line 500 b from the first interlayerinsulating film 160 by the processing gas. The first auxiliary electrode501 is disposed on the second common voltage transmitting line 500 b tocover a plurality of third openings 51 of the second common voltagetransmitting line 500 b, thereby reducing or effectively preventing theelectrical signal resistance of the second common voltage transmittingline 500 b from increasing by the plurality of third openings 51.

Many features according to the above-described embodiments areapplicable to the display device 1000 according to the embodiment inFIG. 14 .

An embodiment of a display device 1000 will now be described withreference to FIG. 15 . FIG. 15 shows a cross-sectional view of a displaydevice 1000.

Referring to FIG. 15 , the display device 1000 is similar to the displaydevice 1000 described with reference to FIG. 9 . No detaileddescriptions on the same constituent elements will be provided.

However, according to the display device 1000 in FIG. 15 , differingfrom the display device 1000 described with reference to FIG. 9 , at thefirst opening 61 of the first interlayer insulating film 160 of thenon-display area NDA, a connecting member 701 is disposed between thecommon voltage transmitting line 500 and the common electrode 730.

The connecting member 701 may be simultaneously provided or formed withthe pixel electrode 710, and supports electrical connection between thecommon voltage transmitting line 500 and the common electrode 730. Whenthe common electrode 730 is short-circuited at lateral sides of organicinsulating layers by steps of a plurality of organic insulating layersdisposed below the common electrode 730, the common voltage transmittingline 500 may be electrically connected to the common electrode 730 bythe connecting member 701 in a same layer as the pixel electrode 710.

As similarly described above, according to the display device 1000 inFIG. 15 , the common voltage transmitting line 500 disposed in thenon-display area NDA is provided or formed to be a double-layeredstructure including a first common voltage transmitting line 500 a and asecond common voltage transmitting line 500 b respectively disposedbelow and above the first interlayer insulating film 160 including anorganic material. The first common voltage transmitting line 500 a and asecond common voltage transmitting line 500 b which face each other areconnected to each other by contacting each other at the first opening 61and the second opening 62 in the first interlayer insulating film 160,thereby reducing electrical signal resistance of the common voltagetransmitting line 500 and accordingly reducing power consumption. Thesecond common voltage transmitting line 500 b disposed on the firstinterlayer insulating film 160 including an organic material includes aplurality of third openings 51 to outgas the processing gas generated bythe organic material during the manufacturing process to the outside,thereby reducing or effectively preventing peeling off of the secondcommon voltage transmitting line 500 b from the first interlayerinsulating film 160 by the processing gas. The second auxiliaryelectrode 502 in a same layer as the common electrode 730 is disposed onthe second common voltage transmitting line 500 b to cover a pluralityof third openings 51 of the second common voltage transmitting line 500b, thereby reducing or effectively preventing the electrical signalresistance of the second common voltage transmitting line 500 b fromincreasing by the plurality of third openings 51.

Many features according to the above-described embodiments areapplicable to the display device 1000 according to the embodiment inFIG. 15 .

A display device 1000 will now be described with reference to FIG. 16 .FIG. 16 shows a cross-sectional view of a display device 1000.

Referring to FIG. 16 , the display device 1000 is similar to the displaydevice 1000 described with reference to FIG. 2 and FIG. 14 . No detaileddescriptions on the same constituent elements will be provided.

However, according to the display device 1000 in FIG. 16 , a recessportion 41 (e.g., recess) provided in plural including a plurality ofrecess portions 41 (e.g., recesses) are defined extended from a topsurface of the first insulating layer 150 disposed below the firstcommon voltage transmitting line 500 a of the non-display area NDA. Aplurality of recess portions 41 increase a contact area between thefirst insulating layer 150 and the first common voltage transmittingline 500 a to improve a contact characteristic of the first insulatinglayer 150 and the first common voltage transmitting line 500 a andreduce or effectively prevent separation of the first common voltagetransmitting line 500 a from the first insulating layer 150. By this,passing of moisture that may be input from outside the first insulatinglayer 150 through a space between the first insulating layer 150 and thefirst common voltage transmitting line 500 a and being input to thedisplay area DA may be reduced or effectively prevented.

As similarly described above, in the display device 1000 of FIG. 16 ,the common voltage transmitting line 500 disposed in the non-displayarea NDA is provided or formed to be a double-layered structureincluding a first common voltage transmitting line 500 a and a secondcommon voltage transmitting line 500 b respectively disposed below andabove the first interlayer insulating film 160 including an organicmaterial. The first common voltage transmitting line 500 a and a secondcommon voltage transmitting line 500 b which face each other areconnected to each other by contacting each other at the first opening 61and the second opening 62 in the first interlayer insulating film 160,thereby reducing electrical signal resistance of the common voltagetransmitting line 500 and accordingly reducing power consumption. Thesecond common voltage transmitting line 500 b disposed on the firstinterlayer insulating film 160 including an organic material includes aplurality of third openings 51 to outgas the processing gas generated bythe organic material during the manufacturing process to the outside,thereby reducing or effectively preventing peeling off of the secondcommon voltage transmitting line 500 b from the first interlayerinsulating film 160 by the processing gas. The first auxiliary electrode501 is disposed on the second common voltage transmitting line 500 b tocover a plurality of third openings 51 of the second common voltagetransmitting line 500 b, thereby reducing or effectively preventing theelectrical signal resistance of the second common voltage transmittingline 500 b from increasing by the plurality of third openings 51.

Many features according to the above-described embodiments areapplicable to the display device 1000 of FIG. 16 .

An embodiment of a display device 1000 will now be described withreference to FIG. 17 . FIG. 17 shows a cross-sectional view of a displaydevice 1000.

Referring to FIG. 17 , the display device 1000 is similar to the displaydevice 1000 described with reference to FIG. 9 and FIG. 15 . No detaileddescriptions on the same constituent elements will be provided.

However, according to the display device 1000 in FIG. 17 , a pluralityof recess portions 41 are defined extended from a top surface of thefirst insulating layer 150 disposed below the first common voltagetransmitting line 500 a of the non-display area NDA. A plurality ofrecess portions 41 increase a contact area of the first insulating layer150 and the first common voltage transmitting line 500 a to improve acontact characteristic of the first insulating layer 150 and the firstcommon voltage transmitting line 500 a and reduce or effectively preventseparation of the first common voltage transmitting line 500 a from thefirst insulating layer 150. By this, passing of moisture that may beinput from outside the first insulating layer 150 through a spacebetween the first insulating layer 150 and the first common voltagetransmitting line 500 a and being input to the display area DA may bereduced or effectively prevented.

As similarly described above, in the display device of FIG. 1 . 17, thecommon voltage transmitting line 500 disposed in the non-display areaNDA is provided or formed to be double-layered structure including afirst common voltage transmitting line 500 a and a second common voltagetransmitting line 500 b respectively disposed below and above the firstinterlayer insulating film 160 including an organic material. The firstcommon voltage transmitting line 500 a and a second common voltagetransmitting line 500 b which face each other are connected to eachother by contacting each other through the first opening 61 and thesecond opening 62 in the first interlayer insulating film 160, therebyreducing electrical signal resistance of the common voltage transmittingline 500 and accordingly reducing power consumption. The second commonvoltage transmitting line 500 b disposed on the first interlayerinsulating film 160 including an organic material includes a pluralityof third openings 51 to outgas the processing gas generated by theorganic material during the manufacturing process to the outside,thereby reducing or effectively preventing peeling off of the secondcommon voltage transmitting line 500 b from the first interlayerinsulating film 160 by the processing gas. The second auxiliaryelectrode 502 is disposed on the second common voltage transmitting line500 b to cover a plurality of third openings 51 of the second commonvoltage transmitting line 500 b, thereby reducing or effectivelypreventing the electrical signal resistance of the second common voltagetransmitting line 500 b from increasing by the plurality of thirdopenings 51.

Many features according to the above-described embodiments areapplicable to the display device 1000 in FIG. 17 .

While this disclosure has been described in connection with embodiments,it is to be understood that the invention is not limited to thedisclosed embodiments, but, on the contrary, is intended to covervarious modifications and equivalent arrangements included within thespirit and scope of the appended claims.

What is claimed is:
 1. A display device comprising: a substrateincluding a display area and a non-display area which is adjacent to thedisplay area; a common voltage transmitting line disposed in thenon-display area and including a first common voltage transmitting lineand a second common voltage transmitting line which overlaps the firstcommon voltage transmitting line; a first insulating layer disposedbetween the first common voltage transmitting line and the second commonvoltage transmitting line; and an auxiliary electrode disposed on thecommon voltage transmitting line, wherein the second common voltagetransmitting line defines a first opening overlapping the firstinsulating layer, and wherein the auxiliary electrode contacts the firstinsulating layer through the first opening and overlaps at least one ofthe first common voltage transmitting line, the second common voltagetransmitting line, and the first insulating layer.
 2. The display deviceof claim 1, wherein the first opening is provided in plural, and theauxiliary electrode covers at least one of the first openings.
 3. Thedisplay device of claim 1, further comprising in the display area: afirst electrode, a second electrode facing the first electrode, and anorganic emission layer between the first electrode and the secondelectrode, wherein the auxiliary electrode is in a same layer as one ofthe first electrode and the second electrode.
 4. The display device ofclaim 1, further comprising in the display area: a first electrode, asecond electrode facing the first electrode, and an organic emissionlayer between the first electrode and the second electrode, wherein thesecond common voltage transmitting line is connected to the secondelectrode, and the auxiliary electrode is in a same layer as the firstelectrode.
 5. The display device of claim 3, wherein the first commonvoltage transmitting line is disposed between the first insulating layerand the substrate, the second common voltage transmitting line isdisposed between the first insulating layer and the auxiliary electrode,and the first common voltage transmitting line is connected to thesecond common voltage transmitting line at a second opening which isdefined in the first insulating layer.
 6. The display device of claim 5,wherein the second electrode which is in the display area extends to thenon-display area, an end portion of the second electrode overlaps thesecond opening and is connected to the second common voltagetransmitting line at the second opening, and the auxiliary electrodeboth contacts the second common voltage transmitting line at the firstopening and is connected to the second electrode by contact at thesecond opening of the second electrode with the second common voltagetransmitting line.
 7. The display device of claim 6, further comprisingin the second opening of the non-display area, a connecting member whichis between the end portion of the second electrode and the second commonvoltage transmitting line and electrically connects the second electrodeto the common voltage transmitting line, wherein the connecting memberis in a same layer as the first electrode.
 8. The display device ofclaim 5, further comprising in the non-display area: a second insulatinglayer facing the first insulating layer with the first common voltagetransmitting line therebetween, and a plurality of recess portions inthe second insulating layer and into which the first common voltagetransmitting line extends.
 9. A display device comprising: a substrateincluding a display area and a non-display area which is adjacent to thedisplay area; in the display area: a transistor including asemiconductor layer, a gate electrode, an input electrode and an outputelectrode, a data line connected to the transistor, a driving voltageline in a same layer as the data line, and an organic light emittingelement including a first electrode, an organic emission layer and asecond electrode; in the non-display area, a first common voltagetransmitting line which is connected to the organic light emittingelement and through which a common voltage is provided to the organiclight emitting element, the first common voltage transmitting line in asame layer as the input electrode and the output electrode of thetransistor; a first organic insulating layer facing the substrate withthe transistor of the display area and the first common voltagetransmitting line of the non-display area therebetween; further in thenon-display area: a second common voltage transmitting line which facesthe first common voltage transmitting line with the first organicinsulating layer therebetween, and at the non-display area, is connectedto the first common voltage transmitting line; an opening which is inthe second common voltage transmitting line and overlaps the firstorganic insulating layer, and an auxiliary electrode which faces thefirst organic insulating layer with the second common voltagetransmitting line therebetween, contacts the first organic insulatinglayer through the opening and overlaps at least one of the first commonvoltage transmitting line, the second common voltage transmitting line,and the first organic insulating layer; and a second organic insulatinglayer facing the first organic insulating layer with each of the dataline and the driving voltage line of the display area and the secondcommon voltage transmitting line of the non-display area therebetween.10. The display device of claim 9, wherein the second electrode which isin the display area extends to the non-display area and is connected tothe second common voltage transmitting line.
 11. The display device ofclaim 9, wherein the first common voltage transmitting line of thenon-display area is in a same layer as the input electrode and theoutput electrode of the display area.
 12. The display device of claim11, wherein the second common voltage transmitting line of thenon-display area is in a same layer as the data line and the drivingvoltage line of the display area.
 13. The display device of claim 12,wherein the auxiliary electrode of the non-display area is in a samelayer as the first electrode of the organic light emitting element ofthe display area.
 14. The display device of claim 13, further comprisingin the non-display area, a connecting member which is between the secondelectrode and the second common voltage transmitting line andelectrically connects the second electrode to the second common voltagetransmitting line, wherein the connecting member is in a same layer asthe first electrode of the organic light emitting element.
 15. Thedisplay device of claim 14, further comprising: a first insulating layerfacing the first organic insulating layer with each of the gateelectrode, the input electrode and the output electrode of the displayarea and the first common voltage transmitting line of the non-displayarea therebetween, and in the non-display area, a plurality of recessportions in the first insulating layer and into which the first commonvoltage transmitting line extends.
 16. The display device of claim 12,wherein the auxiliary electrode of the non-display area and the secondelectrode of the organic light emitting element of the display area arein a same layer as each other.
 17. The display device of claim 10,further comprising in the non-display area, a connecting member which isbetween the second electrode and the second common voltage transmittingline and electrically connects the second electrode to the second commonvoltage transmitting line, wherein the connecting member is in a samelayer as the first electrode of the organic light emitting element. 18.The display device of claim 17, further comprising: a first insulatinglayer facing the first organic insulating layer with the gate electrode,the input electrode and the output electrode of the display area and thefirst common voltage transmitting line of the non-display areatherebetween, and in the non-display area, a plurality of recessportions in the first insulating layer and into which the first commonvoltage transmitting line extends.
 19. A display device including: adisplay area at which an image is displayed and a non-display area whichis adjacent to the display area; the display area including in order: asemiconductor layer of a transistor, a first insulating layer, a gateelectrode of the transistor which corresponds to the semiconductorlayer, a second insulating layer, a storage electrode of a capacitor, athird insulating layer, a layer including an input electrode and anoutput electrode of the transistor which are connected to thesemiconductor layer, a first organic insulating layer, a layer includinga data line connected to the transistor and a driving voltage line, asecond organic insulating layer, a first electrode of an organic lightemitting element, a pixel defining layer in which a pixel opening isdefined corresponding to the first electrode of the organic lightemitting element, an emission layer of the organic light emittingelement which is in the pixel opening, and a second electrode of theorganic light emitting element which corresponds to the emission layer,and the non-display area including in order: the third insulating layerwhich is extended from the display area, a first common voltagetransmitting line which is connected to the organic light emittingelement and through which a common voltage is provided to the organiclight emitting element, the first organic insulating layer which isextended from the display area and in which are defined in order fromthe display area, a first opening and a second opening, a second commonvoltage transmitting line which is connected to the first common voltagetransmitting line at both the first opening and the second opening inthe first organic insulating layer, and defines a third opening which isbetween the first opening and the second opening and exposes the firstorganic insulating layer to outside the second common voltagetransmitting line, an auxiliary electrode which contacts the firstorganic insulating layer through the third opening and overlaps at leastone of the first common voltage transmitting line, the second commonvoltage transmitting line, and the first organic insulating layer, and alayer including a first spacer and a second spacer having differentheights from each other, wherein the second electrode which is in thedisplay area extends to the non-display area and is connected to thesecond common voltage transmitting line within the first opening in thefirst organic insulating layer.
 20. The display device of claim 19,wherein the first common voltage transmitting line of the non-displayarea is in a same layer as the input electrode and the output electrodeof the display area, the second common voltage transmitting line of thenon-display area is in a same layer as the data line and the drivingvoltage line of the display area, and the auxiliary electrode of thenon-display area is in a same layer as the first electrode or the secondelectrode of the organic light emitting element of the display area. 21.The display device of claim 20, wherein the third opening of the secondcommon voltage transmitting line is between the first spacer and thesecond spacer, the second common voltage transmitting line includes afirst portion in the first opening and a second portion in the secondopening, and the third opening of the second common voltage transmittingline is between the first portion of the second common voltagetransmitting and the second portion of the second common voltagetransmitting line.
 22. The display device of claim 19, furthercomprising: a thin film encapsulation layer covering the display areaand the non-display area and including an inorganic encapsulation layerand an organic encapsulation layer, wherein in the non-display area: thefirst spacer includes: a first layer in a same layer as the secondorganic insulating layer, and a second layer in a same layer as thepixel defining layer, the second spacer includes: a first layer in asame layer as the second organic insulating layer, a second layer in asame layer as the pixel defining layer, and a third layer including anorganic material and facing the first layer of the second spacer withthe second layer thereof therebetween, the inorganic encapsulation layerof the thin film encapsulation layer corresponds to the first spacer andthe second spacer, and the organic encapsulation layer of the thin filmencapsulation layer is closer to the display area than both the firstspacer and the second spacer.